Split layout

Arguments

...

Unnamed arguments will become child elements of the layout. Named
arguments will become HTML attributes on the outermost tag.

cellWidths

Character or numeric vector indicating the widths of the
individual cells. Recycling will be used if needed. Character values will
be interpreted as CSS lengths (see validateCssUnit), numeric
values as pixels.

cellArgs

Any additional attributes that should be used for each cell
of the layout.